| DOI: | 10.2172/1248497
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| 报告号: | DOE/SC-ARM--16-003
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| 报告题名: | GoAmazon 2014/15 Thermal Desorption Chemical Ionization Mass Spectrometer (TDCIMS) Field Campaign Report |
| 作者: | Smith, JN
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| 出版年: | 2016
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| 发表日期: | 2016-04-01
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| 总页数: | 16
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| 国家: | 美国
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| 语种: | 英语
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| 中文主题词: | 钾
; 排放物
; 大气辐射
; 冷凝
; 蒸发
; 凝结
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| 主题词: | POTASSIUM
; EMISSIONS
; ATMOSPHERIC RADIATION
; CONDENSATION
; EVAPORATION
|
| 英文摘要: | The Thermal Desorption Chemical Ionization Mass Spectrometer (TDCIMS) deployment to the U.S. Department of Energy (DOE)âs Atmospheric Radiation Measurement (ARM) Climate Research Facility T3 site in Manacapuru, Brazil, was motivated by two main scientific objectives of the Green Ocean Amazon (GoAmazon) 2014/15 field campaign. 1) Study the interactions between anthropogenic and biogenic emissions by determining important molecular species in ambient nanoparticles. To address this, TDCIMS data will be combined with coincident measurements such as gas-phase sulfuric acid to determine the contribution of sulfuric acid condensation to nucleation and growth. We can then compare that result to TDCIMS-derived nanoparticle composition to determine the fraction of growth that can be attributed to the uptake of organic compounds. The molecular composition of sampled particles will also be used to attribute specific chemical species and mechanisms to growth, such as the condensation of low-volatility species or the oligomerization of Îą-dicarbonyl compounds. 2) Determine the source of new ambient nanoparticles in the Amazon. The hypothesis prior to measurements was that potassium salts formed from the evaporation of primary particles emitted by fungal spores can provide a unique and important pathway for new particle production in the Amazon basin. To explore this hypothesis, the TDCIMS recorded the mass spectra of sampled ambient particles using a protonated water cluster Chemical Ionization Mass Spectrometer (CIMS). Laboratory tests performed using potassium salts show that the TDCIMS can detect potassium with high sensitivity with this technique. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1248497
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42176
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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Version |
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| 1248497.pdf（2101KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Smith, JN. GoAmazon 2014/15 Thermal Desorption Chemical Ionization Mass Spectrometer (TDCIMS) Field Campaign Report. 2016-01-01.
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